BA 1349 then FI 451 at Heathrow
Saint Helier → London → Reykjavík
Timetable, London time
16:20BA 1349 from Saint Helier at the gate
12:15FI 451 to Reykjavík leaves the gate
19 h 55 apart on the timetable, overnight
FI 451 leaves 19 h 55 after BA 1349 arrives on the timetable: more than half a day, so not a connection we count.